巨大建筑师于中世纪城市之上

A giant American white man with sharp jawline and defined facial features, wearing a weathered linen coat dusted with chalk, crouched over a sprawling medieval city - delicately placing a cathedral spire with two fingers like adjusting a chess piece, his face concentrated, one eye squinted. City streets below alive with tiny panicking citizens running from his shadow. Golden late-afternoon light rakes across his knuckles. Cold blue shadow swallows the city beneath him. "OzairAI" embossed on the worn leather strap of his rolled-up blueprints tucked under his arm. Vertical 9:13 format. Ultra photorealistic, 8K, no text overlays, cinematic color grading.